How you may have heard of Swedenborg:
Subject of philosophical antagonism by Immanuel Kant’s Dreams of a Spirit Seer (1766)
Often mentioned in support of spiritualism in the 1800’s. Swedenborg had several publicly-verified clairvoyant episodes.
His spiritual writing influenced Emerson, Goethe, Henry James Sr., Dostoevsky, and William Blake.
Raymond Moody at the end of Life after Life relates Swedenborg’s descriptions of stages after death.